2506566 has 16 divisors (see below), whose sum is σ = 5058864. Its totient is φ = 827904.

The previous prime is 2506561. The next prime is 2506571. The reversal of 2506566 is 6656052.

It is an interprime number because it is at equal distance from previous prime (2506561) and next prime (2506571).

It is a super-2 number, since 2×2506566² = 12565746224712, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2506561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1171 + ... + 2526.

It is an arithmetic number, because the mean of its divisors is an integer number (316179).

2^2506566 is an apocalyptic number.

2506566 is an abundant number, since it is smaller than the sum of its proper divisors (2552298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2506566 is a wasteful number, since it uses less digits than its factorization.

2506566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3815.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 2506566 is about 1583.2138200508. The cubic root of 2506566 is about 135.8395960662.

The spelling of 2506566 in words is "two million, five hundred six thousand, five hundred sixty-six".